4330 HOYT AVE Geotech Report 2022-10-25

17311-135th Ave.N.E.Suite A-500 Woodinville,WA 98072 1 NELSON GEOTECHNICAL (425)486-1669 `1/ ASSOCIATES.INC. www.nelsongeotech.com June 23,2020 Mr.John Staniford VIA Email: tomstaniford60@gmail.com Geotechnical Engineering Evaluation—REVISED Staniford Residence Remodel 4328 Hoyt Avenue Everett,Washington NGA File No. 1148519 Dear Mr. Staniford, This letter documents our observations and provides our geotechnical engineering opinions and recommendations regarding the residence remodel project located at 4328 Hoyt Avenue in Everett, Washington, as shown on the Vicinity Map in Figure 1. INTRODUCTION We initially visited the site and met with you on November 13, 2019 to observe the existing site conditions and discuss the project. The site consists of a rectangular-shaped parcel covering approximately 0.25 acres and is currently occupied by a single-family residence and detached garage structure. Topography within the site is mostly level to gently sloping and is vegetated with grass yard areas surrounding the structure. We understand the remodel plans will consist of removing the existing detached garage and constructing a new garage and living space addition to the western portion of the existing house. While onsite we observed that the old detached garage had been removed and footing excavations were at or below desired foundation elevation. The existing residence appeared to be partially supported on approximately 12- to 18-inch concrete piers as observed in the southwest corner of the building. Foundation cracking was also observed in several areas along the exposed western wall. Based on our recent soil explorations and discussions with you, we understand you wish to pursue deep foundation systems in the form of 2-inch diameter pin piles to support the addition foundations and potentially portions of the existing residence.